容器集群管理之Kubernetes 集群中部署nginx

 

 docker pull registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0

 docker tag registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0 gcr.io/google_containers/pause-amd64:3.0

 

# sudo tee /etc/docker/daemon.json <<-'EOF'
> {
>   "registry-mirrors": ["https://xxx.mirror.aliyuncs.com"]
> }
> EOF

# sudo systemctl daemon-reload
# sudo systemctl restart docker

　　

 

 

示例：
# 创建并运行Nginx镜像

kubectl run nginx --image=nginx --replicas=3

　　

# 查看pods

[root@node1 ~]# kubectl get all
NAME           DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
deploy/nginx   3         3         3            0           17h

NAME                 DESIRED   CURRENT   READY     AGE
rs/nginx-7c87f569d   3         3         0         17h

NAME           DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
deploy/nginx   3         3         3            0           17h

NAME                 DESIRED   CURRENT   READY     AGE
rs/nginx-7c87f569d   3         3         0         17h

NAME                       READY     STATUS              RESTARTS   AGE
po/nginx-7c87f569d-crss2   0/1       ContainerCreating   0          17h
po/nginx-7c87f569d-pjhfd   0/1       ContainerCreating   0          17h
po/nginx-7c87f569d-qdxd9   0/1       ContainerCreating   0          17h

NAME             TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE
svc/kubernetes   ClusterIP   10.10.10.1   <none>        443/TCP   17h

# 查看pods及运行节点

[root@node1 ~]# kubectl describe pod nginx-7c87f569d-crss2
Name:           nginx-7c87f569d-crss2
Namespace:      default
Node:           192.168.3.246/192.168.3.246
Start Time:     Sat, 19 May 2018 22:02:11 +0800
Labels:         pod-template-hash=374391258
                run=nginx
Annotations:    kubernetes.io/created-by={"kind":"SerializedReference","apiVersion":"v1","reference":{"kind":"ReplicaSet","namespace":"default","name":"nginx-7c87f569d","uid":"38f94eb7-5b6d-11e8-8406-00163e004a41","a...
Status:         Pending
IP:             
Created By:     ReplicaSet/nginx-7c87f569d
Controlled By:  ReplicaSet/nginx-7c87f569d
Containers:
  nginx:
    Container ID:   
    Image:          nginx
    Image ID:       
    Port:           <none>
    State:          Waiting
      Reason:       ContainerCreating
    Ready:          False
    Restart Count:  0
    Environment:    <none>
    Mounts:         <none>
Conditions:
  Type           Status
  Initialized    True 
  Ready          False 
  PodScheduled   True 
Volumes:         <none>
QoS Class:       BestEffort
Node-Selectors:  <none>
Tolerations:     <none>
Events:
  Type     Reason      Age                  From                    Message
  ----     ------      ----                 ----                    -------
  Warning  FailedSync  2m (x2233 over 17h)  kubelet, 192.168.3.246  Error syncing pod

 

[root@node1 ~]# kubectl get pods -o wide
NAME                    READY     STATUS    RESTARTS   AGE       IP           NODE
nginx-7c87f569d-crss2   1/1       Running   1          5d        172.17.0.3   192.168.3.246
nginx-7c87f569d-pjhfd   1/1       Running   1          5d        172.17.0.2   192.168.3.246
nginx-7c87f569d-qdxd9   1/1       Running   1          5d        172.17.0.2   192.168.3.244

　　

 

# 为deployment资源暴露一个新Service

 

[root@node1 ~]# kubectl expose deployment nginx --port=88 --target-port=80
service "nginx" exposed
[root@node1 ~]# kubectl get all
NAME           DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
deploy/nginx   3         3         3            3           5d

NAME                 DESIRED   CURRENT   READY     AGE
rs/nginx-7c87f569d   3         3         3         5d

NAME           DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
deploy/nginx   3         3         3            3           5d

NAME                 DESIRED   CURRENT   READY     AGE
rs/nginx-7c87f569d   3         3         3         5d

NAME                       READY     STATUS    RESTARTS   AGE
po/nginx-7c87f569d-crss2   1/1       Running   1          5d
po/nginx-7c87f569d-pjhfd   1/1       Running   1          5d
po/nginx-7c87f569d-qdxd9   1/1       Running   1          5d

NAME             TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)   AGE
svc/kubernetes   ClusterIP   10.10.10.1     <none>        443/TCP   5d
svc/nginx        ClusterIP   10.10.10.165   <none>        88/TCP    27s

 

　　

 

# 查看Service

# 查看Service的endpoints

[root@node1 ~]# kubectl get ep  nginx 
NAME      ENDPOINTS                                   AGE
nginx     172.17.0.2:80,172.17.0.2:80,172.17.0.3:80   4m
[root@node1 ~]# kubectl get services  nginx
NAME      TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)   AGE
nginx     ClusterIP   10.10.10.165   <none>        88/TCP    4m